Pro series padlock designed for Masterlock cylinders that allow keying to your home or business keys. This padlock is supplied without the cylinder for using with your exisiting Masterlock or compatible cylinders. Body width: 1-3/4", Shackle diameter: 5/16" (8mm), Vertical Clearance: 1-3/16" (30mm), Horizontal Clearance: 29/32" (23mm). The Master Lock No. 7042 ProSeries Solid Body Padlock features a heavy hardened steel body with chrome rustproofing and a 1-3/16in (30mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance.